Molding machine



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Oct. 13, 19 25.

C. L. LEE

HOLDING MACHINE and May 9, 1923 11 Sheets-sha t 2 4m MM 1% 5 AW Oct.13,1925.

C. L. LEE

HOLDING MACHINE Filed May 1923 11 Sheets-Sheet 3 3;, can; MM

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Oct. 13,1925. 1,5 6 699 C. L. LEE

HOLDING MACHINE Filed May 9, 19 25 11 Sheets-Sheet 4 166' A34 '6 r" {I lI l m5 l 1H @itlffmr Km :2

Oct. 13 1925.

OIJDING uAc-HINE 11 sheet 5 Oct. 13, 1925- 1,556,699

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HOLDING MACHINE Filed May 9, 1923 11 Sheets-Sheet 6 66" 6 11m [nuenZF,1. i 5 i M .665 rim-71? C. L.. LEE

HOLDING MACHINE Filed May 9, 1925 11 Sheets-Sheet 1 123 us [32 IE.

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MOLDING MACHINE Filed Hay Oct. 13 1925- Sheets-Sheet a Ml 2755555 pg, XKM X4 62% 'Oct. 13, 1925- C. L. LEE

uommm MACHINE Filed May 9, 1923 ll Sheets-Sheet 9 a IE -5 L m b hzsglzarne Oct. 13,1925. 1,556,699

C- L. LEE

MOLDING MACHINE Filed May 9, 1923 11 Sheets-Sheet 10 5 11/17275fnus'nl'c? H35 Ak ta- F Oct. 13, 1925- C. L. LEE

HOLDING MACHINE Filed May 1923 11 Sheets-Sheet 11 Q 02 QE MEU M Q 01kwskma H5 tat Q 4 .3 Menu kkwq [157m 9234. m. X M

Patented Oct. 13, 1925.

UNITED STATES 1,556,699 PATENT OFFICE.

CHARLES In. LEE, OI DAYTON, OHIO, ABBIGIIOR TO GENERAL MOTORS RESEARCHCOR- PORATION, OI DAYTON, 0310, A CORPORATION OF DELAWARE.

HOLDING HACHINE.

Application filed May 9, 1823. Serial No. 687,819.

To all whom it may cmwem.

Be it known that I, CHARLES L. Len, a citizen of the United States ofAmerica, residing at Dayton, county of Montgomery, and State .of Ohio,have invented certain new and useful Improvements in Molding Machines,of which the following is a ful clear, and exact description.

This invention relates to moldin machines and particularly to machinesthe type adapted to compress and mold powdered materials. The form ofembodiment of the invention disclosed herein is adapted to mold hollowcylindrical bodies such as bushings.

One object of the invention is to produce molded articles more cheaplythan heretofore.

Further objects are to facilitate the loading of the briquetting dieWith powdered material and the removal of the briqiietted article fromthe die.

The invention broadly comprises a machine having a plurality of moldsand mechanism for compressing material in one mold and simultaneouslytherewith ejecting compressed material from another mold.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the acemnpanyingdrawings, wherein a preferred form of embodiment of the presentinvention is clearly shown.

In the drawings:

Fig. 1 is a side elevation of a machine for forming articles bycompressin powdered material involving the present invention.

Fig. 2 is a fragmentar side view on an enlarged scale showing t e punchslide in one of its positions.

Fig. 3 is a view similar to Fig. 2 showing the punch slide in anotherposition.

Fig. 4 is an end view of the punch slide and its operating mechanism.

Fig. 5 is a view showing in section the molding die with its base blockin upper position, and, in elevation, the mechanism for controlling thedie baseblock and the die arbor.

Fig. 6 is a view similar to Fig. 5 showing the die base block and thedie arbor in lower position.

Fig. 7 is an elevation of the arbor cam follower arm.

Fig. 8 is a fragmentary view of the arbor actuating arm.

Fig. 9 is a fra mental-y plan view of the arbor cam and f0 lower arm.

Fig. 10 shows in section a die support in non-o erative position andshows in elevation t e mechanism for controlling the die support.

.Fi 11 is a view similar to Fig. 10 showmg e die support in operativeposition.

Fig. 12 is a plan view partly in section of the die support.-

Fig. 13 is an end view thereof.

Fig. 14 is a plan view of the ejecting mechanism in non-operativeposition.

Fig. 15 is a. view similar to Fig. 14 showmg the ejected mechanism inone of its operative positions.

Fig. 16 is an elevation partly in section showing the ejector mechanismcorresponding to Fi 14.

Figs. 1 18, 19 and 20 show the relation of certain parts of the machinein successive stages of operation.

Fig. 21 is a chart showing the relation of functions performed bycertain mechanisms of the machine for a. complete cycle of machineoperation or for two revolutions of the main operating shaft or crankshaft.

The machine embodying the present invention comprises in general fourmechanisms, namely: (1) a receptacle for containing the finely dividedmaterial such as metallic powders, which will be known hereafter as thedie or mold; 2) mechanism for periodically locating an clampin aremovable end member of the die which will be knownas the die base; (3)mechanism for compressing the powder within the die;

(4) mechanism for removing the compressed material which will be knownas the work from the die and machine.

Powder containing die or mold.

Referring to Figs. 5 to 9, the powder containing mold includes a clindrical die member 40, a movable base lock 41 and a retractible arbor42 located centrally of the die 40 and projecting through an orifice inthe block 41. If the work is not to be provided with an aperture, it isobvious that the arbor 42 would be omitted as a part of the mold. Thedie 40 is inserted into a suitable recess in a table 43 and is providedwith a flared opening 44 in alignment with the flared opening 45 in acollar 46 whlch is secured to the table 43. The conical or flaredopenings 44 and 45 provide a chute for threctin the powder into thespace between the ar or 42 and the die 40.

For purpose to be described later, the table 43 is provided with twopowder containers such as described, one ein at the left of the centerof the table, and t e other at the right as viewed in Fig. 2. Therefore,for such of convenience, the parts of the left hand container will bedesignated by 3, reference numeral with the affix L and thecorresponding parts at the right will be designated by same referencenumerals accompanied with the aflix R. The table 43 1S supported on across frame member 50 Wl'llCl'l ties together the two princlpal framemembers 51 and 52 of the molding machine. These side frame members 51and 52 are connected at the top by cross bar 53.

Die base locating and, clamping mchanrism.

The die end member or base member 41 is removable from the die 40 andmecha' nism is provided for periodicallymov ng the base 41 against thedie 40 and clamping it in position in such a manner that it may retainwithin the die the powdered material when being COID FEBSSBd underrelatively great pressure. is mechanism includes arbor cam plates and 61driven by cam shaft 62 cooperating with cam followers 63 and 64respectivel mounted on follower arm 65 which oscil ates on a fixed shaft66.

Shaft 62 is mounted on bearings 67 and 68 provided b the side frames 51and 52 res ectively. haft 62 is drlven from the sl'laft 69 by gearing 70and 71 and shaft 69 is driven from the main or crank shaft 72 by meansof gearing 73 and 74. The gear train is such that the cam shaft 62 willmake one revolution for every two revolutions of the main shaft 72.Shaft 72 is journalled in bearings 75 and 76 provided by the side frames51 and 52 respectively. Shaft 72 can be connected by means of a clutch77 with a gear 78 which is loosely mounted on shaft 72 and meshes with agear 79 attached to a power shaft 80' which may be driven by an electricmotor. The clutc 77 is illustrated diagrammatically and is of a typeused general?' in punch presses, that is, 1t can be operate by means ofa suitable foot pedal to cause the shaft 72 to be connected with therotatin gear 78, and, if the pedal be released then t e shaft 72 willcome to rest after having made one revolution.

As this is a common form of clutch no further description is deemednecessary except to disclose a suitable foot pedal operated mechanism.This mechanism is shown dia ammatically in Fig. 1 and includes a pedal81 connected with a. shaft 82 which carries an arm 83 connected by rod84 with the clutch 77. It will be understood that by pressin the pedal81 the clutch will connect the s aft 72 and the gear 78 and the clutchwill be automatically disengaged after one revolution of shaft 72 provied the pressure on the pedal 81 is released before the end of therevolution. From the fore oing it is apparent that each time the peda 81is operated the cam 62 will turn one revolution and then stop. Thepurpos of this will be described later.

The rocker arm 65 is provided with a lug plunger 97 by means of theshoulder .100

provided on arbor 42 and by means of a nut 101 threaded on the lower endof plunger 42 and bearing against a nut 98. A spring 102 is locatedaround the arbor 42 and be fivlveen the shoulder 100 and the die blockrecess 103 provided in the plunger 97 above the shoulder 100. Arbor 42is provided with a recess 42 for receiving a ilot on the formin punch tobe describe The arbor is ho low in order that powder collecting onSpring 102 is received by cylindrical top of the arbor may fall throughto the floor below the machine.

The shaft 62 rotates clockwise in Fig. 6 to cause plate 60 to engaroller 63 and move rocker 65 clockwise. scillation of the rocker 65 willcause the lever 92 to be moved from the position shown in Fig. 6 to theposition shown in Fig. 5, through the action of the ylelding springconnection 94. It is apparent the plunger 97 will be moved upwardly tocause the arbor 42 to project entirely above the block 41 and the chndrical inner wall of the die 40. During t is movement of plunger 97the spring 102 will engage the underside of block 41 and push it againstthe lower end of die 40 with yielding pressure, the conical surface 47of the ,base block 41 engaging with the counterbored companion surface48 of die 40. The arbor 42 when retracted from the die maybe sli htlyout of alignment with the die, but w en the base bloc engages the die,the arbor is automatically centered with the die by the coo cratingsurfaces 47 and 48.

urther rotation of the cam shaft 62 will cause the plate 61 to engagethe roller 64 and cause the rocker arm 65 to be rotatedcounterclockwise. The lug 90 will engage the lug 91 and positively causethe lever 92 to be rotated counterclockwise. Thereupon.

the plunger 97 will be lowered to the position shown in Fig. 6 and theblock 41 will be released and permitted to fall by gravity from thesition shown in Fig. 5 to that SlluWIl in Fig. 6.

The mechanism described locates the arbor and the die block in operativeosition. The mechanism for clampin the (lie block after being locatedwill now e described.

The die block clamping mechanism includes a slidable support mounted forhorizontal movement in a suitable groove having an inclined bottomsurface 112 in the frame member 50. Support 110 is provided with aforked end 111 constructed so as to clear the upper end-of plunger 97and insertable between said inclined surface 112 of the frame 50 and theundersurfuce of the die base block 41 as shown in Fig. 11. The support110 is actuated between the positions shown in Fig. 10 and Fig. 11 bymeans of a box cam 113 mounted on cam shaft 62 and havin a race 114 coocrating with a follower ro or 115 mounted on one end of a lever 116pivotally supported at 117 and connected at its upper end b link 118with a clevis 119 which is threa ed into a bushin 120 rotatablysupported by a slide 110. ushing 120 is retained in-position by means ofa shoulder 121 provided thereon, and by means of a nut 122 threaded uponthe bushing. A lock nut 123 is threaded on the stem of the clevis 119.By loosening the nut 123 the bushing" 120 may be turned so as to adjustthe slide 110 with respect to its operating mechanism. Then the nut 123may be clamped against these bushings 120 to maintain the clevis 119 inits adjusted position. Obviously, rotation of the cam 113 in clockwisedirection will cause the mechanism to be moved intermittently from theposition shown in Fi 10 to that shown in Fig. 11 and then back to theoriginal position.

Powder compressing mechanism.

When the parts of the mold are located as shown in Figs. 5 and 17 apredetermined quantity of finely divided material can be introducedbetween the arbor 42 and the die 40 as indicated at 125. The mechanismfor comprcssin the powder 125 includes a punch having a pilot 130 andattached to a punch slide 131 which is supported for horizontal slidingmovement by a T-shaped groove 132 provided-in a block 133 which isattached to a press head or plunger 134. The ends of the groove 132 areblocked by means'of plates 135 attached by screws 136 so that endwisemovement of the block 131 is limited. The press head 134 is supportedfor vertical sliding movement by means of gibs 137 and 138- attached byscrews 139 and 140 to the frames 51 and 52 respectively.

The press head 134 is attached by a pin 141 with a link 142 having abearing 143 for receiving a crank 144 provided by the shaft 72.Obviously rotation of shaft 1 72 will cause the head 134 and the punch130 to enter one of the molds and compress the work therein.

The plunger 130 cooperates with the left and right hand moldsalternately therefore mechanism has been provided for aligning the punch130 alternately with ;the dies 40 and 40. This mechanism includes punchslide operating cams and 151 driven by shaft'62 and cooperatingrespectively with follower rollers 153 and 154 mounted on rocker arm 155loosely journalled on rod 66 and'attached to a clevis 156 connected bythe rod 157 and a rod end 158 with an arm 159 pivoted on a shaft 160carried by a cross frame member 161 attached by bolts 162 to side frames51 and 52. The arm 159 includes a bifurcated portion 163, the branchesof which each sup ort a. spring pressed plunger 164 ada to to engage alug .165 extending from a ub 166 which is mounted on shaft 160 andsupports a punch slide shifting yoke 170 having cumming portions 171 and172 adapted to cooperate with a roller 173 mounted on a bracket 174attached to the slide 131.

Rotation of the cam plates 150 and 1.51 will cause the lever 155 to beoscillated and consequently the shifting yoke will actuate the slide 131to align the punch 130 either with the die 40 or with die 40 When theslide 131 contacts with the left hand end plate 135* the plunger 130will be aligned with the die 40 asshown in Fig. 3. The travel of the arm159 is slightly greater than enough to'move the left hand and of slide131 into contact with plate 135 and over-travel is ermitted since motionis transmitted from t io lever 159 to one of the s ring pressed plungers164. Rotation of the cams 150 and 151 will cause the ri ht hand and ofslide 131 to engage the stop p ate 135 as shown in Fig.2. The downwardmovement of lever 159 from the osition shown in Fig. 3 to that shown inig. 2 is more than enough to cause the right hand end of slide 131toengage the stop plate 135. and overtravel is permitted because motionis transmitted to one of the spring pressed plungers 164.

As shown in Fig. 3 the camming surface 171 is in a vertical position sothat the plunger 130 may be lowered relative tothe yoke 170 while theeke remains in this position to maintain tie plunger 130 in alignmentwith the die 40 2- The slide 131 cannot move endwise because it isconfined in one direction by the engagement with the end plate 135 andin the other direction because of the engagement of the roller 173 withthe surfhce 171 of yoke 170.

. the powder The mechanism stripped from the arbor.

' so that for every When the slide 131 isin the position,

shown in Fig. 2, the camming surface 172 of yoke 170 will be vertical topermit the punch 130 to move vertically, downward. During its movementthe punch 130 is maintained in alignment with the die because endwisemovement of the slide 131 is prevented by the end plate 135 and by theengagement yoke surface 172.

Downward movement of the press head 134 willcause the plunger 130 tocompress 125 into the form of a hollow cylindrical member '180 shown inFig. 18. This body may be termed for sake of convenience a bushing orthefwork. After the work has been formed by the machine it is removedautomatically by mechanism which will now be described.

Work removing mechanism.

The mechanism for removing the work includes ejecting plungers f8? and181 mounted on the slide 131 and spaced from the plunger 130 at adistance equal to that between the vertical center lines of the dies 40*and 40 so that while the material in die 40 is being compressed byplunger 130, the work previously formed in die 10 can be ejected as willbe apparent from Figs. 17 Ind 18 and also so that the Work previouslyformed in die 40 can be ejected while the powder 125'is being compressedin the die 40 as is apparent from Figs. 19 and 20.

Referring to Figs. 17 and 18, the downward movement of the ejectingplunger 181 causes the bushing 180- to be forced out of the die 40 whilethe arbor 42 is being withdrawn from the die 40 This 0 eration takesplace after the block 4:1 has en released by its clamping mechanism sothat it may fall by gravity into a suitable pocket or receptacleprovided by the frame 50. for actuating the plunger 42 will draw itbelow the upper side of the block 41 as shown in Fig. 18, therebycausing the bushing 180 to be stripped from the arbor and to rest uponthe block 41.

Mechanism has been provided for ejecting the work from the machine afterit has been This mechanism includes anejecting arm 190 attached to ashaft 191 pivoted upon the frame and connected by arm 192 and link 193with lever arm 194 attached to shaft 195 rotatably mounted on bracket196 provided by the machine frame. Shaft 195 carries arm 197 providedwith a cam following roller 198 which cooperates with the face 199 ofthe drum cam 200. The cam 200 is constructed two revolutions of thecrank shaft 72, the arm 190 will be shifted alternately toward the baseblocks 41' an 41 in order to knock off a bushing which has been locatedon a base block. In Fig.

of roller 173 with the 15 the arm 190 has been actuated so as to knockoff a bushing) 180 from the right hand die block and ushing 180 willslide or roll down an incline chute 201 into a suitable receptacleprovided at the side of the machine. a

Operations occurring during one machine cycle.

Heretoforc the operations of separate mechanisms of the machine havebeen described. The machine however provides for alternately compressingmaterial in two molds, therefore, in order to understand the entiremachine, it. will be necessary to describe its operation with respect tothe two molds. The following descri tion is made particularly withreference to Figs. 17 to 21 inclusive. In Fig. 21 curve A indicates themovements of the unch 130 for two revolutions of the cran shaft 72. Thecurve B indicates the corresponding movements of the left arbor 42'. Thecam plates compris ing the camfor controlling the left arbor areindicated at B in Fig. 1. The curve C shows the corresponding movementsof the right arbor 42*, and the cam which controls 42 is indicated at Cin Fi 1. The curve D indicates the correspon ing movements of the leftdie support 110 and the cam for controlling sup ort, 110" is indicatedat D in Fig. 1 and a so by 113 The movements of the right die su port110 are indicated by curve E, and E esignates the cam for controlling110 also referred to as 113. Curve F designates the movements of punchslide 131 and the cams for controlling the slide 131 are designated by Gdesignates the corresponding movements of the ejector 190 and theejector cam is designated by letter G in Fig. 1 and also by numeral 200.

Cams B, C, D, E, F and G are all located upon spect to the shaft 72 sothat the various functions of the machine will occur in the orderindicated by cam chart, Fig. 21.

Assuming that the machine is at rest, and that the location of the partswill be as indicated by the zero degree line in Fig. 21, Figs. 2 and 17show the location of certain arts in accordance with the zero degreeine. As indicated in Figs. 2 and 17, the ejecting punch 181 and theforming punch 130 are aligned respectively with the dies 40? and 40 andthe ejecting plunger 181 is in non-operating position." The left arbor42 is in uppermost position and the right arbor 42 in partly retractedposition. The left die support 110 is in non-operating position but thedie block 41" is resiliently pressed against the bottom of the die 40 (1The right die support 110 is retracted to the die block 41 to bereceived by permit The ejector 190 a recess'in the frame 50.

the shaft 62 which is timed with rc- F in Fig. 1. Curve .ary.

is located in non-operating osition as shown in Fig. 14. While the macline is at rest, a determined quantity of finely divided materials(metallic owder for metallic bearings) is poured into the left hand moldas indicated at 125 in Fig. 17. The 0 erator resses the treadle 81causing the cran shaft 2 to make one revolution and then stop at aposition corresponding to the 360 degree line in Fig. 21.

As the punch 130 descends, the punch slide 131 starts to move to theleft at 20 and is com letely moved to the left at 100 crank shai t'revolution, as indicated by curve F at the same time the left die support 110" into a clamping position as indicated l curve D. During thisperiod the left arbor, the right arbor, the right die su port and theejector remain station- The movement of the punch slide 131 has broughtthe ejecting unches and the forming punch into positions indicated bydot and dash lines in Fig. 17. The ejecting lun er 181 is innon-operating position, the ormin punch 130 is aligned with the die anthe ejecting plunger 181 is aligned with the die 40.

Beginning at about 105, the lower end of punch 130 will engage the upperend of arbor 42, the pilot 130 being received by the bore of the arborto maintain the arbor concentric with the die. The arbor 42 will.

' form the work or bushing 180'. The. loca- 180" and the arbor 42 andwill push them shaft downwardly beginning at about 150 and enderebycau'sing both the work 210" the cam tion of the parts corresponding to180 of crank shaft movement is as shown in Figs.

1 and 18. Left arbor 42* has been actuated by the plunger while its cam13 has been turned a certain amount suflicient to retain the arbor 42 inthe position shown in'Fig. 18 after the punch recedes from it. Shouldthe arbor travel down faster than determined by the cam B the s ring 94shownin Fig. 6 will be stretched al owing lever 92 to rotate faster thanthe rocker arm 65. The lugs 90 and 91 will be separated in case thelever 92 should move faster than the rocker 65, but after the lunger 130recedes from the arbor 42 the ugs 90 and 91 will be engaged throughtheaction-of spring 94 so that the cam B will be effective to locate the.arbor 42F. During the first downward movement of e press head 134 theejecting plunger 1 1" will engage the work ing'with 180, t and the arbor42 to be ejected from the die 40. Beginnin" (l will draw the arbor 42partly through .the base block/11 as indicated by the dotted line 42" inFig. 18.

shown in Fig. 20. at 180 and ending with This movement causes the work180 to be strip d from the arbor 42 and rest upon the lock 41. At about190 the ejector 190 begins to move from its position shown in Fig. 14and arrives at position shown in Fig. 15 at about 225. This movementcauses the work 180 to be knocked off the block 41 and to slide down achute 201". The ejector 190 returns to non-operating position at about255. 1

Figs. 3 and 19 show the location of certain parts corresponding to the360" line in Fig. 21. The punch 130 and ejecting pluners have moved touppermost position, and

urin this movement the arbor 42 has move to uppermost position and theblock 41 is resiliently supported a ainst the bottom of the die 40" sothat t e right hand mold is ready for receivin powdered material. Atthis time the armor 42 remains in partly retracted position and the leftdie support 110 has been withdrawn from under the die 40 permitting itto drop down into the lower position shown in Fig. 19. At this time theright die support 110 is in nonoperating position.

As explained before, the machine comes to rest automaticall at the endof one crank shaft revolution. hile the machine is at rest, the righthand mold is filled with material 125. The operator then presses thepedal 81 causing the machine to start and the crank shaft to make onerevolution designated on the chart b 360 to 720. Be inning at 380 and ening with 460, the s ide 131 is moved to the ri ht in order to locate thepunch 130 and t e ejecting plungers 181 and 181 in Iposition indicatedby dot and dash lines in ig. 19. At 460 the ejecting lunger 181 and theuncli 130 will bea igned res ectively wit the dies 40* and 40 and t eplunger 1S1 will be in non-operative posit1on.' The right die support110 will have moved under the die 40 at 460 and will remain in clampingposition until about 570 and then will return to non-operating ositionat 720. As the press head descen s the punch 130 will engage the arbor42 beginning at about 465 an these parts will continue in engagementuntil 540 at which time the powder has been compressed to complete thework or bushing 180". The pilot 130' is received by recess 42" so thatpunch 130 will maintain the arbor 42 concentric to the die 40". i

20 shows certain parts ofthe ap ratus. in positions eorres'pgnding to540 crank 's time, the left arbor l movement. At :2 ant?l wigkt180"hhavia been ejected rom e' 1e vtepungerlil 'as From 540 to 570 thecam C is operative to draw the arbor 42" down into the positionindicated by the dotted line 42 thereby causin the. work 18 0 to bestripped froflkthe ar r 42 and to rest upon the block 41 The arbor 42remains in lowest position until about 615 and then returns to hi hestposition at about 700 so as to be rea y for a repetition of the machinecycle. From about 550 to about 585 the ejector 190 moves toward the dieblock 41 and knocks oil the bushing 180 causing it to move down thechuteQOI At about 610 the ejector 190 turns to non-opcrating position.The work 180 and the arbor 42 remain in the position shown in Fig. 20until the end of the machine 0 cle. The right die support 110 will havecan withdrawn at the end of the cycle to allow the die block 41 to dropdown into the position shown in Fig. 17. At 700 the sleeve 97" will havemoved upwardly to cause the die block 41" to be resiliently pressedagainst the bottom of the die 40". The left hand mold will therefore bein position for receiving a charge of powder. Then the cycle ofoperations can be repeated.

\Vhile the form of embodiment of the present invention as hereindisclosed, constitutes a preferredform, it is to be understood thatother forms might be adopted, all coming within the scope of the claimswhich follow.

What I claim is as follows:

1. In a machine of the kind described, the combination with means forreceiving finelydivided material, including a mold and a removable endmember therefor; means for periodically moving the end member againstthe mold; means for periodically clamping said member rigidly againstthe mold; means for compressing tie material in the mold while said endmember is rigidly clamped against the mold; and means for ejectin thecompressed material from the mol when the member is se arated for saidmold.

2. In a machine of tie kind described, the combination with means forreceiving finelydivided material, including a mold and a removable endmember therefor; means for periodically moving the and member againstthe mold; a wedge periodically operable to clamp said member rigidlyagainst the mold; a plun er for compressing the material in the mo (1while said end member is rigidly clamped against the mold; and anotherplunger for ejecting the compressed material from the mold when themember is separated from said mold.

3. In a machine of the kind described, the combination with means forreceiving finelydivided material, including a mold and a removable endmember therefor; means for periodically moving the end member againstthe mold; a wedge constructed and arranged rigidly to clamp the endmember against the mold and to permit the end-membermoving means to moveaway from the said member; means for compressing the material in themold while t 0 end member is rigidly being held against the mold; meansfor removing the wedge when the compression operation is completed; andmeans for ejecting the compressed material from the mold when the endmember is separated therefrom after removal of the wedge.

4. In a machine of the kind described, the combination with means forreceiving finely divided material including a mold and a removable endmember therefor; of means for periodically moving and clamping said endmember against the mold and then releasing said member; and means forcompressing the material within the mold while said member is clamped inposition; means for ejecting the compressed material endwise from themold and causing said material to be supported by the end member; andmeans for removing the material from the endmember.

5. In a machine of the kind described, the combination with means forreceiving finely divided material including a mold having a filleropening at the top thereof, and including a base block removable fromthe bottom of the mold, of means for periodically moving and clampingthe base block against the mold and then permitting the block to dropaway from the die; a forming punch vertically movable into the mold forcom ressing the material in the mold against the lock; and means forremoving the com: pressed material through the bottom end of the moldwhen the base block is separated therefrom.

6. In a machine of the kind described, the combination with. means forreceiving finely divided material including a mold having a filleropening at the top thereof, and ineluding a base block removable fromthe bottom of the mold; of means for periodically moving and clampingthe base block against the mold and then permitting the block to dropaway from the mold; a form ing punch vertically movable into the moldfor compressing the material in the mold against the block; means forpushing the compressed material out through the bottom of the mold andonto the supporting block when the block is separated rem the mold; andmeans for removing the material from the block.

7. In a machine of the kind described, the combination with means forreceiving finely divided material including .a. mold having a filleropening at the top thereof, and ineluding a base block removable fromthe bottom of the mold; of means for periodically moving the base blockagainst the mold; means for clamping the base block in operativeposition and then releasing the base block, said moving means permittingthe base block to drop away from the mold; means for compressing thematerial in the mold against the base block; and means for removing thecompressed material from the r mold.

Ill

8. In a machine of the kind described, the combination with a mold forreceiving finelydivided material; an arbor extending into the mold;means for compressing said material against the arbor and walls of themold; means for moving the arbor with the compressing means when thelatter is compressing the material; means for removing the compressedmaterial and arbor from the mold; and means for withdrawing the arborfrom the material.

9. In a machine of the kind described, the combination with a mold forreceiving finelydivided material; an arbor extending into the mold;means for compressing said material against the arbor and walls of themold; means for moving the arbor with the compressing means when thelatter means is compressing the material; and means for removing thematerial from the mold.

10. In a machine of the kind described, the combination with a mold forreceiving finely-divided material; an arbor extending into the mold andincluding a bore in its end; a plunger punch having a pilot adapted toenter the bore of the arbor, said punch bein constructed and arranged toconcurrentli move the arbor through the mold and compress the materialagainst the arbor and walls of the mold; means forpremoving thecompressed material and arbor from the mold; and means for withdrawingthe arbor from the compressed material.

11. In a machine of the kind described, the combination with a mold forreceiving finely-divided material; a removable end member for the mold;.a forming punch constructed and arranged snugly to fit into said slidethrough the mold; an arbor extendin through the end member into themold, said arbor having a sliding bearing in the end member and being oflesser transverse dimension than the forming punch; means for moving theforming punch into the mold for compressing the material therein, andsupportin means between the forming punch an arbor which cooperates with.the end member for maintaini the arbor in correct relative position int e mold when said arbor is moved through said mold by the movement ofthe punch into said mold. V

12. In a machine of the kind described, the combination with means forreceiving finely-divided material including a mold and a removable endmember therefor; an arbor extendin throu'gh said end member and into themob means for periodically locating and rigidly clamping said en memberagainst the mold; means constructed and arranged to move the arborthrough the.

mold and end member and at the same time compress the material in themold against the arbor and walls of the mold; means for removing thecompressed material and arbor from the mold; and'means for withdrawingthe arbor from the compressed material.

13. In a machine of the kind described, the combination with a mold forreceiving finely-divided, material, said mold including a removable endmember; an arbor extending through said end member and into themoldpnieans for periodically locating and rigidly clamping said endmember against the mold; means constructed and arranged to move thearbor through the mold and end member and at the same time compress thematerial in the mold against the arbor and walls of the mold; and meansfor removing the compressed material from the mold and from the arbor.

14. A machine of the kind described, coluprising in combination, a moldfor receiving finely-divided material; an end member for the mold andincluding an extended portion adapted to enter the mold; means For moving said end member against the mold so that the extended portion entersthe mold: and means for ri 'idly wedging the said end member against tnemold.

153. A machine of the kind dcscribwl, comprising in combination, a moldfor receiving finely-divided material; an end member for the mold andincluding an extended portion adapted to enter the mold: means formoving said end member against the mold so that the extended portionenters said mold; means for rigidly wedging the end member against themold; an arbor having a sliding bearing in said end member and soconstructed and arranged as to extend into the mold; a forming punch;and means for moving the forming punch into the moldto con'ipress thematerial in said mold and at the same time cause the punch to push thearbor through the mold. 16. In a machine of the kind described, thecombination with means for receiving finely divided material including amold and a. removable end member therefor, and including an arborlocated within the mold; of means for periodically locating and clampingsaid endmember against the mold; means for compressing the materialagainst-the arbor and walls of the mold; and means for removing thematerial from the machine. l a

17. In a machine of the kind described, the combination with means forreceiving finely divid'ed material including a mold, a removable endmember therefor, and including an arbor located within the mold andprojecting through the end member; of means for periodically located andclamping said end member against the mo] means for compressing thematerial against the arbor and walls of the mold; means for removin thearbor and material from the mold w en the end member is separatedtherefrom; and means for moving the. arbor through the end member tostrip the material from the arbor.-

18. In a machine of the kind described, the combination with means forreceivin finely divided material including a mol having a filler openingat the top'thereof, including a base block removable from the bottom ofthe mold, and includin an arbor 19. In a machine of the kind described,

the combination with means for receiving finely divided materialincludin a mold having a filler opening at the top t e-reof, in eludinga base block removable from the bottom of the mold, and including anarbor projecting through the base block into the mold'yof means orperiodically moving the base block against the mold; means for clampingthe base block in operative position and then releasin the base block,said moving means permitting the base.block to drop away from the mold;means for compressing the material in the moldagainst the base block andarbor; means for removing th' arbor and material from the bottom of themold when the base block is separated therefrom; and means for movin thearbor through the base block to strip 05 the work.

20. In a machine of the kind described, the combination with means forreceiving finely divided material including a mold and a removable endmember therefor, and including an arbor located within the mold; ofmeans for periodically locating and rigidly clamping said end memberagainst the mold; means for compr ing the material against the arbor andwalls of the mold; means for removing the material from the arbor; andmeans for removing the material from the end of the mold adjacent thesaid end member when said member is separated from the mold, and forremoving the material from the machine.

21. In a machine of the kind described, the combination with means forreceiving finely divided material including a mold having a filleropening at thetop thereof, including a base block removablefrom thebottom of the mold, and including an arbor projectin through a baseblock into the mold; 0

means for periodically moving and clamping the base block inst the moldand then permitting the bl to drop away from the die; a fcrmin punchvertically movable into the mold %or compressing the material in themold against the block and arbor; means for removing the material fromthe arbor; and means for removing the material from the mold through thebottom of the mold when the base block is separated therefrom. 22. In amachine of the kind described, the combination with a luralit of moldseach having a removable em; member; means for moving one end memberagainst its mold and rigidly clamping it against said mold whilepermitting the other end member to be released and moved away from itsmold; and a frame member supporting a forming punch and ejectingplungers and adapted to move in one direction for compressing materialin one mold while removing compressed material from the other mold.

23. In a machine of the kind described, the combination with a pluralityof molding dies each having a filler opening at its upper end, and eachhaving a removable base block;

means for moving a base block against a die and clamping it in positionwhile permitting the other base block to be separated from itsrespective die; and means for compressing the material in one die whileremoving compressed material from another die through the bottomthereof.

24. In a power-driven machine of the kind described, the combinationwith a plurality of molding dies; of a forming punch; an e ectingplunger; a common support for said punch and plunger; power-driven meansfor moving said support whereby alternately to align the punch with adie and a lunger with a die; and means for moving said support towardthe dies.

25. In a power-driven machine of the kind described, the combinationwith a plurality of molding dies located with their axes vertical andparallel; of a vertically movable forming punch; a vertically movableejecting plunger; a common support for said unch and plunger;power-operated means or moving said support h-orizontall wherebyalternately to align the punch with a die and a plunger with a die; andmeans for movin said support toward the dies.

26. n a power-driven machine of the kind described, the combination withtwo molding dies arranged with their axes parallel; a forming punch forcooperating with either die; an ejecting plunger for each die; commonmeans arranged on one side of the die for supporting said punch andplungers with the punch disposed between the plungers and at a distancefrom each plun er equal to the distance betweenthe axes of die dies;powerdriven means for moving said support whereby alternately to alignthe punch with a die and a plunger with a die; and means for moving saidsupport toward the dies.

27. In a power-driven machine of the kind described, the combinationwith a plurality of molding dies located with their axes parallel andvertical; of a forming punch for successively cooperating with the dies;a support for said punch; and power-operated means for moving thesupport horizontally to align the punch with one of the dies and formoving the support vertically to cause the punch to enter ,one of thedies.

28. In a power-driven machine of the kind described, the combinationwith a plurality of dies disposed with their axes vertical; of a punchfor cooperatin with either of said dies; a iQrizontally slidable supportfor said punch; and power-operated means for shifting the support-tosuccessively align the punch with the dies, said means maintainingalignment while permitting the punch and sup rt to move vertically; andpower-operate means for moving the support vertically.

29. In a machine of the kind described,

the combination with a plurality of molds operating with either of saidmolds; a horizontally slidable punch supporting slide; stops forlimiting the travel of the slide in either direction; and means forshifting the slide in either direction against a stop and maintaining itin said position while rmitting vertical movement of said s do andpunch; and means for molding the slide vertically.

31. In a machine of the kind described, the

combination with two molds disposed with their axes vertical; ofa punchfor cooperating with either of said molds; a horizontally slidable punchsupporting slide; stops for limiting the travel of the slide in eitherdirection; and means for shifting the slide in either direction againsta sto and maintaining it in said position un er yielding pressure whilepermitting vertical movement of said slide and punch; and means formoving the slide vertically.

32. In a machine of the kind described, the combination with a pluralityof molds; of a plurality of arbors each for projecting into a mold; andmeans for alternately locating one arbor in a mold in a manner such thatmaterial can be laced within the mold about said arbor whi e maintaininganother arbor within a quantity of compressed material in another mold.

33. In a machine of the ldnd described, the combination with a pluralityof arbors each insertable into a mold; and means for compressin materialin one mold around its arbor w ile removing compressed material and thearbor from another mold.

34. In a machine of the kind described, the combination with a pluralityof arbors each insertable into a mold; and means for compressingmaterial in one mold around its arbor while removing compressed materialand the arbor from another mold, and then stripping the compressedmaterial from said other arbor.

35. In a-machine of the kind described, the combination with a pluralityof arbors each insertable into a mold, and means for compressingmaterial in one moldaround its arbor while removing compressed materialand the arbor from another mold, and then stripping the compressedmaterial from said other arbor and then ejecting said compressedmaterial from the machine.

36. In a machine of the kind described,

the combination with a plurality of arbors each insertable into a mold;and means for compressing material in one mold around its arbor whileremoving compressed material and the arbor from another mold, thenstripping the compressed material from said other arbor, then ejectingsaid compressed material from the machine, and then inserting said otherarbor in said other mold.

37., In a machine of the kind described, the combination with aplurality of molds,

each having a removable base block; of

means for alternately movin one of said base blocks toward one of t emolds and clamping it against said mold while permitting the ot er blockto be released and to be separated from the other mold; of a pluralityof arbors each projecting through a base block into a mold; and meansfor compressing material in one mold against its lock and arbor whileremoving the com pressed material and arbor from the lower end ofanother mold while its base block is separated therefrom.

38. In a machine of the kind described, the combination with a pluralityof molds each having a removable base block; 0 means for alternatelymovin oneof said base blocks toward one of t e molds and clamping it aainst said mold whi e permitting the other block to be released and tobe separated from the other mold; of a plurality of arbors eachprojecting through a base block into a mold; and means for compressingmaterial in one mold against its lock and arbor while removing thecompressed material and arbor from the lower end of another mold whileits base block is separated therefrom, and then moving said other arborto said other base block

